[LTP] [PATCH] close_range: check for kernel support below 5.9

[Edward Liaw]

Hey Petr,

We turned on the HAVE_CLOSE_RANGE flag to test the bionic-defined
close_range on Android, but doing so bypasses tst_syscall in
include/lapi/close_range.h.  We don't currently have a way to
configure ltp differently across each kernel version, so I wanted to
use this check as a fallback to gate earlier kernels.

Thanks,
Edward


On Fri, Feb 3, 2023 at 2:25 AM Petr Vorel <pvorel@suse.cz> wrote:
>
> Hi,
>
> hm, I was too fast to merge it. Looking at older result,
> It looks like this (merged as 7b5ee03899) was not needed,
> because tst_syscall() properly detects missing support:
>
> close_range01.c:134: TINFO: Plain close range
> ../../../../include/lapi/close_range.h:25: TCONF: syscall(436) __NR_close_range not supported on your arch
>
> @Edward: Before we revert it, did you encounter some problem that it's really
> needed? If yes, please share details.
>
> Kind regards,
> Petr